Fixes issue 408
Merge pull request #411 from ronnieholm/develop

Fixes #408
Merge branch 'master' into develop
Bump version to 2.15.3
Merge branch 'develop'
Bump version to 2.15.4
Add Tachyus as a user.
Merge pull request #414 from panesofglass/develop

Add Tachyus as a user.
Merge branch 'master' of github.com:fsharp/FAKE